基于各向同性Sobel算子的H.264/AVC帧内预测模式选择算法

Sotropic Sobel Operator Based Mode Decision Algorithm for H.264/AVC Intra-Frame Prediction

H.264/MPEG-4 AVC定义了9种4×4亮度块的预测模式,在参考模型JM中所采用的RDO计算复杂度较高。本文提出了一种基于各向同性Sobel算子的H.264的快速帧内编码模式选择算法,降低预测的复杂度,提高编码速度。测试表明,此算法能够使编码速度提高将近75%。

There are nine different modes for intra prediction of 4 × blocks in the H. 264/MPEG-4 AVC standard,Rate -distortion optimization（RDO） is employed to compute the RDCost in JM. In order to reduce the complexity, we proposed a Isotropie Sobel Operator Based Mode Decision algorithm. Experimental results show that without considering a little of performance degradation and bitrate increase, the encoding speeds up about 75%.